Improvement in hot-air furnaces



'SBXTON e BBARD.

Hot-Air Furnace.

No. 108,733. Patented Oet. 25,'1'8'701'` FIG-.2.

WWW/$358.

NV PETERS, PHOTO-LITHOGRAPHER, WASHINGTON, D (2y ititrd gister gaat apta.

SAMUEL B. SEX-'ron AND enonenvv. BEAnD, or BALTIMORE. nARY= LAND.

' Letters Patent No. 108,733, dated October 25, 1870.

IMPROVEMENT IN HOT-AIR FURNACES.

The Schedule referred to in these Letters Patent and making part of the samel the following is a specication.

liatu're and Objects of. the Invention.

The apparatus has acentral vertical fuel-magazine; the fire-pot discharges its heated gases vinto a radiating chamber with corrugated sides; from the radiator the. gases pass to the chimney.

The radiator forms a chamber around the mag zine, the intervening space being occupied lby a current of air, which isheated'thereby, and-is then mingled in the dome with a body of air heated between the radiator and the outside casing.

From the dome the-heated air passes `by pipes to the apartments to be heated.

Themagazine is supplied by a spout which passes through both air-spaces and the radiator.

Deectors in the air-spaces prevent a too rapid escape of the air.

Provision is made forremoving accumulation of ashes from the lower part of the radiator.

Description of the Accompanying Drawing. Figure l is a vertical central section of the furnace on the line x x, iig. 2. 4

Figure 2 is a part elevation and part section, the latter-mentioned portion being on a line at right angles to the section, iig. 1.

Figure 4 is a horizontal section on lthe line y y,

A General Description. A is the circular fire-pot; B, the grate; and G,. the ash-pit of the stove. D is the door of the fire-chamber, and E E, mica windows, for viewing the re. F is the external casing, a'nd G, the dome.-- H is the pipe by which heated air is carried on" to an apartment tobe warmed'.

I, the crown-'plate of the fire-chamber; has three openings, one in center where it is penetrated by the lower end of the fuel-magazine J, andtwo openings K K, which allow the heated gases to escape to the Figure 3 is a horizontal section on the line-z z, fig. 1.

radiator, which is bounded by the corrugated plates L L', which give a zigzag course to the gases 'which' traverse therein.

M is the ue-prpe, by which the said gases are eventually discharged into the chimney.

The magazine J is partly supported by the crown-.K y, plate I, through which it protrndes, and partly by a suspension rod1 N, which'vdepends from the crownbar O, which rests upon the top ot' the radiator.

The magazine is charged through theV spout P, which has a cover, p.

. .As the coal burns away in the fire-pot, other coal from the magazine becomes ignited and the ire is maintained.

Ou the top of the crown-plate Iare two short tubes' K K, on which are short pipes on the bottoni of the radiator.`

The corrugated vform of L', gives a large extent of radiating surface, and has 'the practical effect of an extension of the length of the chamber beyond its actual vertical-height.

Onl the outside ofthe magazine J, and upon the inside ofthe outer casing F, are anges or plates S,

which act as detiectors to detain .the heated current by practicallylengthening its course and forming "eddies. v

T is au opening, by which ashes 'accumulatingl in the bottom of the radiator maybe removed.I

V V are openings in the aring side plate of the stove, by which the spaces on each'side of the radiator are supplied with air. l j:

The re itself is supplied with air through the ashpit and grate.

.When the furnace is only intended to heatv a room or rooms'above, the outer casing may come down to the floor, so as to use all the heat radiated by the lower part of the furnace.

Claim.

What we claim as new isi The combined arrangement of the central magazine, the annular radiator, the casing F, and the'detlecting flanges S S, substantially as shown and described, for` y lthe bounding plates L` 

